Remove recording button

Remove the recording button that was added to the sample clip view with
commit 48c4dce96f.

This commit simply reverts the aforementioned one.

include/SampleClip.h

@@ -81,8 +81,6 @@ public:
 	void setIsPlaying(bool isPlaying);
 	void setSampleBuffer(std::shared_ptr<const SampleBuffer> sb);
 
-	BoolModel& recordModel() { return m_recordModel; }
-
 public slots:
 	void setSampleFile(const QString& sf);
 	void updateLength();

include/SampleClipView.h

@@ -27,13 +27,10 @@
 
 #include "ClipView.h"
 
-class QWidget;
-
 namespace lmms
 {
 
 class SampleClip;
-class BoolModel;
 
 namespace gui
 {
@@ -62,19 +59,13 @@ protected:
 	void dropEvent( QDropEvent * _de ) override;
 	void mouseDoubleClickEvent( QMouseEvent * ) override;
 	void paintEvent( QPaintEvent * ) override;
-	void resizeEvent(QResizeEvent *event) override;
 
-private:
-	QWidget* buildRecordWidget(BoolModel& recordModel);
-	void adjustRecordWidget();
 	bool recordingCapabilitiesAvailable() const;
 
 private:
 	SampleClip * m_clip;
 	QPixmap m_paintPixmap;
 	bool splitClip( const TimePos pos ) override;
-
-	QWidget* m_recordWidget;
 } ;